[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.201486] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.638238] random: sshd: uninitialized urandom read (32 bytes read) [ 22.807802] random: sshd: uninitialized urandom read (32 bytes read) [ 23.644251] random: sshd: uninitialized urandom read (32 bytes read) [ 23.791991] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. [ 29.242231] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/15 21:46:30 parsed 1 programs [ 30.841405] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/15 21:46:32 executed programs: 0 [ 32.055577] IPVS: ftp: loaded support on port[0] = 21 [ 32.172881] WARNING: CPU: 0 PID: 4550 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 32.181344] Kernel panic - not syncing: panic_on_warn set ... [ 32.181344] [ 32.188742] CPU: 0 PID: 4550 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #51 [ 32.195939] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.205311] Call Trace: [ 32.207891] dump_stack+0x1c9/0x2b4 [ 32.211504] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.216695] panic+0x238/0x4e7 [ 32.219873] ? add_taint.cold.5+0x16/0x16 [ 32.224009] ? __warn.cold.8+0x148/0x1ba [ 32.228069] ? __warn.cold.8+0x117/0x1ba [ 32.232115] ? smc_unhash_sk+0x357/0x4b0 [ 32.236170] __warn.cold.8+0x163/0x1ba [ 32.240052] ? smc_unhash_sk+0x357/0x4b0 [ 32.244106] report_bug+0x252/0x2d0 [ 32.247726] do_error_trap+0x1fc/0x4d0 [ 32.251605] ? graph_lock+0x170/0x170 [ 32.255397] ? math_error+0x3e0/0x3e0 [ 32.259184] ? lock_acquire+0x1e4/0x540 [ 32.263142] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.267971] do_invalid_op+0x1b/0x20 [ 32.271677] invalid_op+0x14/0x20 [ 32.275117] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 32.279768] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 88 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 89 42 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 73 21 58 fa [ 32.298938] RSP: 0018:ffff8801d8abf9f8 EFLAGS: 00010293 [ 32.304288] RAX: ffff8801d8946540 RBX: ffff8801ac6650c0 RCX: ffffffff8761c7f6 [ 32.311544] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 32.318795] RBP: ffff8801d8abfae0 R08: ffff8801d8946540 R09: ffffed00358cca28 [ 32.326049] R10: ffffed00358cca28 R11: ffff8801ac665143 R12: 1ffff1003b157f43 [ 32.333300] R13: ffff8801d8abfab8 R14: ffffffff899373c0 R15: ffff8801ac665140 [ 32.340570] ? smc_unhash_sk+0x296/0x4b0 [ 32.344617] ? smc_unhash_sk+0x357/0x4b0 [ 32.348661] ? smc_unhash_sk+0x357/0x4b0 [ 32.352705] ? smc_rx_data_available+0x120/0x120 [ 32.357445] ? release_sock+0x1ec/0x2c0 [ 32.361414] ? __local_bh_enable_ip+0x161/0x230 [ 32.366070] ? __release_sock+0x3a0/0x3a0 [ 32.370214] ? smc_release+0x2c9/0x670 [ 32.374089] ? trace_hardirqs_on+0xd/0x10 [ 32.378222] ? __local_bh_enable_ip+0x161/0x230 [ 32.382876] smc_release+0x3cf/0x670 [ 32.386577] __sock_release+0xd7/0x260 [ 32.390455] ? __sock_release+0x260/0x260 [ 32.394583] sock_close+0x19/0x20 [ 32.398026] __fput+0x355/0x8b0 [ 32.401295] ? fput+0x1a0/0x1a0 [ 32.404557] ? _raw_spin_unlock_irq+0x27/0x70 [ 32.409045] ____fput+0x15/0x20 [ 32.412316] task_work_run+0x1ec/0x2a0 [ 32.416186] ? task_work_cancel+0x250/0x250 [ 32.420502] ? exit_to_usermode_loop+0x8c/0x370 [ 32.425154] exit_to_usermode_loop+0x313/0x370 [ 32.429717] ? syscall_slow_exit_work+0x500/0x500 [ 32.434549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.440091] do_fast_syscall_32+0xcd5/0xfb2 [ 32.444405] ? do_int80_syscall_32+0x890/0x890 [ 32.448980] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.453723] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.459355] ? syscall_return_slowpath+0x31d/0x5e0 [ 32.464267] ? sysret32_from_system_call+0x5/0x46 [ 32.469093] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.473923] entry_SYSENTER_compat+0x70/0x7f [ 32.478318] RIP: 0023:0xf7f8ecb9 [ 32.481747] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 32.501188] RSP: 002b:00000000ffd14c4c EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 32.508899] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000008150138 [ 32.516156] RDX: 0000000000000004 RSI: 0000000000000001 RDI: 00000000ffd15308 [ 32.523409] RBP: 00000000000003c0 R08: 0000000000000000 R09: 0000000000000000 [ 32.530668] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 32.537916] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 32.545804] Dumping ftrace buffer: [ 32.550033] (ftrace buffer empty) [ 32.553727] Kernel Offset: disabled [ 32.557333] Rebooting in 86400 seconds..